Formation of Earth’s Atmosphere - The early Earth was very different from our Earth today. The early Earth experienced frequent impacts fr...
Formation of Earth and Our Solar System
Formation of Earth and Our Solar System - We can construct the formation history of our solar system by looking at regions where other sta...
Geologic Time Scale
Geologic Time Scale - How many years is a “long time?” We often express time in hours or days, and 10 or 20 years certainly feels like a l...
Groundwater Erosion and Deposition
Groundwater Erosion and Deposition - Not all water that falls on the land flows through rivers and streams. When it rains, much of the wat...
Erosion and Deposition by Rivers and Streams
Erosion and Deposition by Rivers and Streams - As streams move over the ground, they transport weathered materials. Streams continually er...
Types of Soils
Types of Soils - If we were to talk to soil scientists, you would learn that there are thousands of types of soil. Soil scientists study e...
Characteristics and Importance of Soil
Thank goodness for mechanical and chemical weathering, because without these forces working to breakdown rock we would not have any soil on...